Its completely plausible, in the Medieval ages, peasants made up the bulk of the armies,
actually most didn't even receive training, and just had whatever weapons and armor they owned when called by their king to fight.
However it would only work if the enemy army was also made up of lowly commoners,
in a DnD setting though, an Undead, Ogre, Orc, or Drow army would absolutely annihilate a group of peasants, i would think the norm would be for human kingdoms to even stand a chance, to either have a professional standing army, or to train their peasants regularly.
Gameplay wise, setting them up with a warrior template would definitely make sense
actually most didn't even receive training, and just had whatever weapons and armor they owned when called by their king to fight.
However it would only work if the enemy army was also made up of lowly commoners,
in a DnD setting though, an Undead, Ogre, Orc, or Drow army would absolutely annihilate a group of peasants, i would think the norm would be for human kingdoms to even stand a chance, to either have a professional standing army, or to train their peasants regularly.
Gameplay wise, setting them up with a warrior template would definitely make sense